Career
He ran the anchor leg on the gold medal winning 4x400 meter relay team at the 2004 Summer Olympics in Athens. Each of the aforementioned relay teams also included Baylor teammate Jeremy Wariner. He set a personal best of 44.27 seconds in the 400 meter run in the semifinals of the National Collegiate Athletic Association Outdoor Championships in 2005.
He is a 2001 graduate of Business Careers High School in San Antonio, Texas.
Williamson was in the foster care program of the State of Texas and is a Preparation for Adult Living(North American Palladium Ltd) alumnus.